Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-10-22
PoS DIS2010:179,2010
Physics
High Energy Physics
High Energy Physics - Experiment
on the behalf of the H1 Collaboration
Scientific paper
Photoproduction events containing a charmed meson $D^{*\pm}$ and two jets were investigated with the H1 detector using the HERA II data sample. The $D^*$ meson was reconstructed in the decay channel, $D^{*\pm}\rightarrow D^0\pi^\pm\rightarrow K^\mp\pi^\pm\pi^\pm$. Jets were reconstructed using the inclusive $k_t$ algorithm and were selected if they have transverse momenta $p_t(\textrm{jet})>3.5\gev$. One of the jets was associated with the $D^*$ meson itself, such that the jet originating from the parent charmed quark as the meson can be tagged. The phase space of the measurement is limited within central rapidity for the $D^*$ meson and the $D^*_\textrm{jet}$, $|\eta|<1.5$ while the second jet was measured within, $-1.5<\eta<2.9$. Single differential cross sections and double differential distributions were measured and compared to Leading Order Monte Carlo (MC) event generators, \PYTHIA and \CASCADE and with the Next--to--Leading order MC generator \MCATNLO
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